Mass Effect 3‘s US sales for the month of March add up to 1.3 million copies, data cruncher NPD has told Joystiq. That’s physical copies only though, for all Xbox 360, PS3 and PC. The game was released digitally via PSN and Origin as well. No data is available from those.
According to Microsoft man Aaron Greenberg, Xbox 360 took 943,000 of those 1.3m and outsold the PS3 version 4-to-1. A similar picture was painted in the UK when the game first launched; the 360 version took 73% of all week one boxed sales.